Printing-press.



G. R. CORNWALL.

PRINTING PRESS.

APPLICATION TILED JULY 5, 1907.

Patented Aug. 4, 1914.

6 SHEETS-SHEET l.

[nnw/a' By 1 1 [1121 9305 Aug E QMZ%J G. R. GORNWALL.

PRINTING PRES.

APPLIOATIOH Hum JUL! 5, 1901.

1,105,964. I Patented Aug.4,1914.

5 BEBE-THEE 2.

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Patented Aug. 4, 1914.

6 SHEETS-SHEET 3.

G. R. CORNWALL.

PRINTING PRESS.

, nrucnron mum JULY 5. 1901. 1,105,964.

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an 3 av 3 Mil/ 25595 HIHHHIIIIIHIIIIIIIEIIIIIIlllllllllllllllllllllil G.R. CORNWALL.

PRINTING PRESS.

LPPLIOATIOH I ILED JULY 5, 1007.

1,105,964. Patented Aug. 4, 1914.

5 SHEETS-SHEET 4.

..... P I m1 3}! m G. R. CORNWALL.

PRINTING PRESS. APPLICATION FILED JULYB, 1907.

1,105,964, Patented Aug. 4, 1914.

, I 5 SHEETS-SHEET 5. f JJ y g 9 Ana/y UNITED STATES PATENT OFFICE.

GEORGE R. CORNWALL, OF RYE, NEW YORK, ASSIGNOB '10 AMERICAN PLANOGRAPHCOMPANY, A CORPORATION OF WEST VIRGINIA.

PRINTING-PRESS.

To all whom it may concern:

Be it known that I, GEORGE R. ConNwALL, a citizen of the United States,and a resident of Rye, county of \Vestchester, and State of New York,have invented certain-new and useful Improvements in Printing-Presses,of which the following is a specification.

The invention relates to printing presses and more especially to rotarypresses printing by offset. i

Objects of the invention are to provide a press for printing upon bothsides of the mpression-receiving material by an offset 1mpression; toprovide a press which shall be compact and conven1ent; to provide meansfor protecting the printing surfaces from injury by failure of theimpression-receiving material, or otherwise; to provide means forcontrolling the impression and the action of the inking mechanism bothautomaticall v and manually; to provide a press which may be simply andexpeditiously set to print either a single or perfecting impression; toprovide for adjustment and arrangement of the different parts so thatthe press may be conveniently and advantageously run for differentpurposes; to provide the press structures of great usefulness andconvenience: to provide for getting up color upon the plates upon theform cylinder or upon the offset surfaces either separately orsimultaneously; and to provide-for moving and arranging the presselements so as to perform the different functions with little or nodisturbance or arrangement of other elements. These and other objects ofinvention will in part be obvious and will in part more fully appearherein.

The invention consists in the novel parts, arrangements. constructions,combinations. and improvements herein shown and described.

The accompanying drawings, referred to herein and forming a part hereof,illustrate one embodiment of the invention. the same serving in connection with the description herein to explain the principles of thein-, vention.

If the drawings: Figure 1 is an elevation of a press constructed in partin accordance with the principles of the invention; Fig. 2 is a viewcorresponding to one half of Fig. l with the press frame and certain,other parts removed for clearness; Fig. 3 is a fragmentary view inelevation of portions of the Specification of Letters Patent.

Application filed July 5, 1907.

Patented Aug. 4, 1914.

Serial No. 382,174.

control mechanism; Fig. 4 is a fragmentary elevation of a form cylinderand its inking system with the control therefor; and Figs. 5 and 6 areviews, partly diagrammatic, showing different positions of some of thepress elements.

The embodiment of the invention illustrated in the accompanying drawingsby way of example, shows a press in which two ofi'set cylinders,designated as l and 2, are arranged to form a printing couple. A p111-rality of form cylinders are also provided in the said embodiment andare shown herein as two in number, indicated respectively by thereference numerals 3 and 4. The said parts are constructed and arrangedso that one of the offset cylinders forming the printing couple receivesa design from one of the form cylinders and the other offset cylinderreceives a design from the other form cylinder. In the illustratedembodiment the offset cylinder 1 receives a design from form cylinder 3and offset cylinder 2 receives a design from form cylinder 4. It will beunderstood that the said parts, together with the other parts of thepress, are mountedin a frame in suitable cooperative relation with eachother. The form of press frame hereinshown is indicated generally by thereference numeral 5.

According to certain features of the invention it is contemplated toseparate the offset cylinders to throw off the impression withoutseparating either of said offset cylinders from itsform cylinder.According to certain features of the invention this may be effected bymoving one of the cylinders only, but according to other featuresthereof it is contemplated to move both of said cylinders and theparticular form of means shown herein acts to move both offset cylindersaway from impression. According to certain features of the inventionautomatic means of the kind indicated are contemplated. Furthermore, theinvention in some of its aspects contemplates automatically controllingthe impression throw-off from the impression-receiving material as wellas leaving such means free for operation by the attendant.

In the present embodiment, and having in mind the features of theinvention herein- .before specified, together with other feaalso meansfor yieldingly holdlng the cylinders to position. In the illustratedembodiment the said means act directly upon the swinging frame 6 andcomprise spiral springs 7 working between the swinging frame 6 and asuitable part of the press frame 5. A turning head 8 threaded upon astud mounted in the swinging frame 6 is shown for regulating thepressure of the springs7. The position of the offset cylinder withrespect to the other offset cylinder is determined by a turning head 9mounted upon the swinging frame 6 and working against a suitable face onthe press frame 5. The particular form of means for separating theoffset cylinders against the pressure of their springs 7 shown hereincomprises a segmental rack 10 upon each of the swinging frames 6 and twointermediate geared sectors 11 and 12 meshing with each other and oneengaging with one rack 10 and the other with the other rack 10. Fixedupon the shaft 13, upon which the geared sector 12 is fixed, there isshown an arm 14 connected by a pivoted link 15 to an arm 16 fixed to asleeve 17 rotatably mounted upon a shaft 18. Fixed to the sleeve 17 isan arm 19. In operative relation with the free end of the arm 19 is acam 20 mounted upon a shaft 21. The said parts are so constructed,arranged and proportioned that the cam 20 will rock the arm 19 and,through the train of mechanism just described, will rotate the sectors11 and 12 which acting through the racks 10 will swing the frame 6 inopposite directions thus separating the offset cylinders 1 and 2 fromeach other. As the movement of the cam 20 continues the arm 19 will rockin the oppositeflirection and the frames 6 will be allowed to approacheach other until the cylinders 2 are finally positioned by means of thesprings 7 and turning heads 9. In this embodiment also the cam 20 is soshaped that at such time it is out of contact with the arm 19.

As hereinbefore indicated, suitable means for supplyingimpression-receiving material are provided, and the embodied form ofsuch means is adapted for feeding a web through the press. The saidillustrated form comprises the two offset cylinders and feed rolls 22driven in a suitable manner as by gear trains to the form cylinders. Thesaid rolls are mounted upon arms 23. Fixed with reference to the arm 23is shown an arm 24 connected by a link 25 to an a m 26 upon the shaft13. It will be seen, therefore, that in the present embodiment the feedrolls will be thrown off and on with the impres- S1011.

According to certain features of the invention, and as hereinbeforeexplained, the throw-ofl' mechanism for the impression is controlled bythe impression-receiving material and in the illustrated embodiment aform of means for effecting this is shown. The throw-off mechanism isalso capable of actuation by the press operator. A paper roll 27 isshown suitably mounted upon the press frame, the web being guided bysuitable rolls between the printing cylinders 1 and 2 and the feed rolls22. A turning bar 28 is shown for the purpose of giving a side delivery.A series of rolls 29 bear upon the web on one side thereof' and oppositeto a roll or series of rolls 30 before the web passes between the offsetcylinders. As shown herein the said rolls form part of an electricalcircuit comprising a suitable source of energy such as a'battery 31.Between the detector rolls 29 and 30 and the shaft 21 suitable controldevices are provided. The said control devices are designed in thepresent embodiment for calling the shaft 21 into rotation. There is, inthe illustrated form of such means, loosely mounted upon the shaft 21 adriven gear 32 with which cooperates a clutch 33 which clutch isprovided with suitable shoes 34 for engaging a ring fixed with referenceto the gear 32. The shoes 34 are mounted upon levers 36 having a toggleaction, the said levers being pivoted to a sliding collar 37. The collar37 is connected by a rod 38 within the shaft 21 to an external collar39. (lo-acting with the collar 39 is a forked lever 40 suitably pivotedupon the machine frame. Located adjacent to the lever 40 is a latchwheel 41 which is shown provided with three latches 42. The said latchesare shown yieldable transversely to the plane of the latch wheel 41 butfixed circumferentially and in the plane of the said wheel. Each of thesaid latches is so shaped that when it encounters the lever 40 it willfirst have a camming ac tion upon the lever to rock it upon its pivotand after the lever is rocked to be in turn held by the lever. Suitablylocated with reference to the latches 42 is a trip 43 designed to becontrolled from the web.

In the present embodiment the controlling device comprises a magnet 44in circuit with the rolls 29, 30 and the battery 31. When the magnet 44is energized it rocks the trip 43 on its pivot and the latch 42 then inposition is swung clear of the lever 40 so that the clutch 33 will drivethe shaft 21 from the gear 32. A suitable spring 45 is utilized toactuate the clutch when not restrained by the lever 40. Suitable meansare provided for the purpose of deenergizing the magnet 44 so as topermit the trip 43 and springimpelled latch 42 to return to engagingposition. In the illustrated form the disk 92 of non-conducting materialis shown carried upon the shaft 21, said disk carrying a contact piece93. lVhen the parts are in position for the feeding of the web throughthe press the contact piece 93 rests between the contact fingers 94which are in the electrical circuit which controls the magnet 44.

It is contemplated by certain features of the invention to have theimpression throwoil' and the throw-off for the impression-receivingmaterial feeding means operable by the press operator. In the presentembodiment, therefore, a form of means for efl'ecting this is provided.The form of said means comprises a trip 46 coiiperating with the latches42 and connected by a springpressed, pivoted rod 47 to a foot lever orpedal 48. The rod 47 is connected with lever 48 by a spring hook 49which at a suitable position of the parts arcs free from the lever 48and allows the return of pedal 48 to its tripping position, the spring50 then serving to return the trip 46 to its normal position independentof further movement of the pedal 48. The pedal 48 is also returned toposition by suitable means, .such as a spring.

Suitable devices are provided for controlling the ink rolls andaccording .to certain features of the invention it is contemplated toprovide means for throwing off the ink rolls simultaneously with thethrowing-off of the impression or for allowing the ink rolls to remainin contact with the forms when the impression is thrown off. There isalso provided in the present embodiment means for throwing off the inkrolls by hand independently of the other mechanisms for controlling theink and a form of such means will be described herein.

The form of means for throwing ofl? the ink rolls from the formcylinders shown in connection with the present embodiment comprises acam 51 fixed upon the shaft 21. In operative relation with the cam 51 isshown a lever 52 fixed upon a rock shaft 64 suitably mounted in theframe of the machine. Fast to the shaft 64 is an arm 65 and connectedthereto is a pivoted link 53 which also connects to a bell crank 54. Thebell crank 54 is connected b'ya pivoted link 55 to a lever 56. The lever56 is connected to toggles 57. The toggles 57 are connected to the inkroll supporting carriage 58 which slides in guides 59 upon the pressframe. As the toggles are broken and made the carriage 58 moves down andup and the ink rolls 60 aremoved into and out of contact with the formcylinder 4.

In the present embodiment there are two ink roll supporting carriages 58shown associated with each form cylinder and each of these is providedwith suitable toggles 57. A pivoted link 66 and crank arms 67 are shownfor the purpose ofconnecting the toggles 57 so that the ink rolls for agiven cylinder ma be lifted or dropped together when desired. It will beunderstood also that the opposite end of the press is supplied withsubstantially similar mechanism which need not be described in detail.In the present embodiment the connection between link 53 and bell crank54 is shown as comprising a slot in the end of the rod 53 and a pin 61in the corresponding end of the bell crank 54. A pin 62 normallyconfines the pin 61 to one end of the slot in the link 53 so that thelink 53 and bell crank 54 move together. Upon removing the pin 62 thelink 53 will move without moving the bell crank 54. It will thus be seenthat a form of means is provided for throwing the ink rolls on and oilwith the impression or for rendering these two movements independent ofeach other. As hereinbefore stated, a form of mechanism is rovided forthrowing off and on the ink rol s independently from the mechanisms justdescribed, and the illustrated form comprises a latch lever 69 fixed toa rock shaft 68 to which also are fixed the bell cranks 54. It will beunderstood that by removing the pins 62 the ink rolls may be thrown onand ofl by means of the latch lever 69. The link 70 is shown extendingto the corresponding ink-controlling mechanism upon the other end of themachine for coiiperating with the other form cylinder. As the saidmechanism may be substantially identical with that just described,detailed description thereof will be unnecessary.

It is contemplated by the invention in certain of its as ects to providemeans for separating an 0 set cylinder and its form cylinder and a formof such means is shown as a part of the embodiment illustrated herewith.In the said illustrated form the offset cylinder is mounted slidably inthe swinging frame 6, a particular form of such mounting comprising ajournal box 71 mounted to slide on ways 72 in the frame 6. The said boxis held to position by the spring 73 and the position of the cylinder isadjustably determined by a turning head 74 acting between the journalbox 71 and the frame 6. It will thus be seen that a yielding adjustablemounting is provided and that the offset cylinder may be moved to andaway from its form cylinder. Suitable devices for moving the offsetcylinder away from its form cylinder against springs 73 are provided.The form of such mechanism illustrated comprises toggle levers 75pivoted to the frame 6 and to the sliding journal boxes 71. Pivoted tothe said toggle levers is a link 76 connecting to'a bell crank lever 77.The connection between the link 76 and lever 77 is shown as apin-and-slot connection (see especially Fig. 2 of the drawings) in orderthat the throw-off for the offset cylinders may operate withoutseparatin either offset cylinder from its form cylinder. A pivoted link78 connects the said lever with an arm 79 fixed upon the shaft 18. Asecond arm 80 is also fixed upon the said shaft and its free end is inoperative relation to a cam 81 upon the shaft 21. The other offsetcylinder is shown mounted in a substantially similar manner and havingpractically similar connections. Additional connections comprising abell crank lever 82, link 83 and an arm 84 completing the train to theshaft 18 are shown.

Suitable driving mechanism for the entire press is provided which may beany suitable or convenient form. There is shown in connection with thepresent embodiment, however, fast and loose belt pulleys 85 mounted on ashaft 86. A spur pinion 87 is mounted on an arm 88 mounted on the shaft86. The said spur pinion 87 is also mounted on an arm 89 which swingsconcentrically with the offset cylinder 2. It will thus be seen thatthere is driving connection between the shaft 80 and the printingcylinders at all times notwithstanding any movement of the printingcylinder for throwing off the impression or for separating the offsetcylinder and its form cylinder.

Any suitable gear trains for driving the different parts of the pressmay be provided and no detailed description thereof will be necessary.In the present embodiment the spur gearing on the two form cylinders andtwo printing cylinders intermesh from one to the other so that thev maybe driven in exact relation to each other. A suitable belt shifter 90 isprovided for shifting the belt from one pulley to the other. The pressmay be one adapted for carrying planographic printing plates and in suchcase suitable damping mechanism will be used. Damping mechanisms 91 areaccordingly shown herein but need not be described in detail, as theform thereof constitutes no part of the present invention.

The manner of operation of the hereindescribed mechanism issubstantially as follows: The press may be considered for convenience ashaving the web running from the roll 27 past the detector rolls 29 and30, past suitable guide rolls, between the offset cylindcrs 1 and 2,between the feed rolls 22 and over the turning bar 28. Should any defectoccur in the paper the rolls 29 and 30 would serve to close the circuitand thus energize the magnet 44 which, acting upon the trip 43,

would rock the latch 42 free from the lever 40. The spring 45 would thenpermit the clutch to engage the pinion 32 thus bringing the shaft 21into rotation. The movement of cam 20 acting on lever arm 19 andtherethrough upon arm 16, link 15 and arm 14. This will cause thesectors 11 and 12 to rotate and, acting through the racks 10, to swingthe frames 6 against the spring 7 so as to slightly separate thecylinders 1 and 2. At the same time the arm 26, fixed upon the shaft 13,is actuated and through the lever 25 and arm 24 slightly separates thefeed rolls 22 and the feed of the web is stopped. Should the operatordesire to trip the prem he can do so by means of the foot lever 48which, acting through the spring hook 49 and sliding rod 50, wouldoperate the trip 46 which would co-act with the latch 42 in the manneralready described in connection with the trip 43. It will be understoodthat when the next latch 42 encounters the lever 40 it will first serveto cam the lever 40 so that it swings on its pivot so as to throw outthe clutch 33. While the foregoing action is tak ing place the cam 51has acted upon the lever 52 to throw off the inking mechanisms from theform cylinders 3 and 4 by means of the trains of mechanism for thatpurpose hereinbefore described.

Should it be desired to separate the offset cylinders from their formcylinders this may be effected through the mechanism provided for thispurpose. By tripping the foot lever 48 the second latch 42 may bereleased from the lever 40 and the shaft 21 again called into action.The cam 81 now causing the arm 80, and the arm 79 which is fixedrelatively to the arm 80, to act through the link 78, bell crank 77, andlink 76, to make the toggles 7 5, thus sliding the journal boxes 71,carrying the offset cylinders, against the springs 73 and away from theform cylinder. It will be understood that when the latch 42 comes intooperative relation with the lever 40 the clutch 33 will be again thrownout and the shaft 21 come to rest. leaving the cylinders in the positiondescribed. If this latch 42 be moved away from the lever 40 the shaft 21would be again caused to rotate, the cam 81 will permit the lever arm 80to resume its former position and acting through the train of mechanismdescribed it will break the toggles 75 and the offset cylinder willagain assume operative position with reference to its form cylinder. Thecam 51 will also permit the lever 52 to assume its former position andthrough the trains of mechanism described the ink rolls will be againbrought into contact with their form cylinders. The cam 20 will alsorotate so as to pass out of engagement with the lever 19 and the twoprinting cylinders will be brought to the printing position withreference to each other, and the feed rolls 22 will also be brought incontact with the web. The manual control of the ink rolls by the lever69 will be understood from the description.

It will be understood that should it be desired to use the inkingmechanism while vided which realizes the objects of invention and theadvantages herein set forth, to-

; gether with other objects and advantages.

The invention. in its broader aspects, is not limited to the particularconstructions shown. nor to any particular constructions by which it hasbeen or may be carried into effect, as many changes may be made in theconstruction without departing from the main principles of the inventionand without sacrificing its chief advantages.

What I do claim as my invention and desire to secure by Letters Patent,is:

1. A printing press including in combination a plurality of planographicform cylinders, two offset cylinders constructed and arranged to form aprinting couple and so that one of said ofl'set cylinders receives adesign from one of the form cylinders and the other offset cylinderreceives a design from another form cylinder and a single mechanismconnected to each end of one of said offset cylinders for moving saidoffset cylinder away from impression with respect to the other offsetcylinder Without separating it from its form cylinder.

2. A printing press including in combination a plurality of formcylinders, two ofl'set cylinders constructed and arrange to form aprinting couple and so that one of said ofl'sct cylinders receives adesign from one of the form cylinders and the other offset cylinderreceives a design from another form cylinder. and automatic means formoving an offset cylinder away from impression with respect to the otheroffset cylinder without separating it from its form cylinder.

3. A printing press including in combination a plurality of formcylinders, two 011"- set cylinders constructed and arranged to form aprinting couple and so that one of said ofl'set cylinders receives adesign from one of the form cylinders and the other offset cylinderreceives a design from an other form cylinder, means for feeding animpression-receiving material between the form cylinders, and meanscontrolled by the impression-receiving material for moving an offsetcylinder away from impression with respect to the other offset cylinderwith out separatingit from its form cylinder.

offset cylinders constructed and arranged to form a rintin couple and sothat one of said 0 set cy inders receives a design from one of the formcylinders and the other offset cylinder receives a design from anotherform cylinder, and means for simultaneously movin each of the saidoffset cylinders away roin impression without separating an offsetcylinder from its form cylinder.

5. A printing press including in combination a plurality of formcylinders, two offset cylinders constructed and arranged to form aprinting couple and so that one of said offset cylinders receives adesign from one of the form cylinders and the other offset cylinderreceives a design from another form cylinder, means for feedlng animpression-receiving material between the form cylinders, and meanscontrolled by the impression-receiving material for simultaneouslymoving each of the said offset cylinders away from impression withoutseparating an offset cylinder from its form cylinder.

6. A printing press including in combination a plurality of planographicform cylinders, ink rolls for each form cylinder, two

offset cylinders constructed and arranged to form a printing couple andso that one of said offset cylinders receives a design from one of theform cylinders and the other offset cylinder receives a design fromanother form cylinder, and a single mechanism connected to both ends ofan offset cylinder for moving an offset cylinder away from impressionwith respect to the other offset cylinder without separating it from itsform cylinder and for throwing oil the ink rol-ls from the formcylinder.

7. A printing press including in combination a plurality of formcylinders, ink rolls for each form cylinder, two ofli'set cylindersconstructed and arranged to form a printing couple and so that one ofsaid offset cylinders receives a design from one of the form cylindersand the other offset cylinder receives a design from another formcylinder,

' and means for moving an ofi'set cylinder away from impression withrespect to the other offset cylinder without separating it from its formcylinder and for simultane ously throwing off the ink rolls from theform cylinder.

8. A printing press including in combina-' tion a plurality of formcylinders, ink rolls for each form cylinder, two offset cylindersconstructed and arranged to constitute a printing couple, means forfeeding an impression-receiving material between the offset cylinders.and means controlled by the impression-receiving material for throwingoh. the impression while permitting each ofi'set cylinder to remain incontact with its form cylinder and for throwing off the ink rolls fromthe form cylinder.

9. A printing press including in combination a plurality of formcylinders, two offset cylinders constructed and arranged to form aprinting couple and so that one of said ofiset cylinders receives adesign from one of the form cylinders and the other ofi'set cylinderreceives a design from another form cylinder, means for feeding animpressionreceiving material between the form cylinders, means formoving an offset cylinder away from impression with respect to the otherofi'set cylinder without disturbing its relation to the form cylinder,and means for simultaneously stopping the feed of theimpression-receiving material.

10. A printing press including in combination a plurality of formcylinders, two ofi'set cylinders constructed and arranged to form aprinting couple and so that one of said ofi'set cylinders receives adesign from one of the form cylinders and the other offset cylinderreceives a design from another form cylinder, means for feeding animpression-receiving material between the form cylinders, a singlemechanism connected to both ends of an offset cylinder for moving saidofi'set cylinder away from impression with respect to the other ofi'setcylinder without disturbing its relation to the form cylinder, and meanscontrolled by the operator for stopping the feed of theimpression-receivin'g material.

11. A printing press including in combination a plurality of formcylinders, two offset cylinders constructed and arranged to form aprinting couple and so that one of said ofi'set cylinders receives adesign from one of the form cylinders and the other offset cylinderreceives a design from another of the form cylinders, automatic meansfor separating the offset cylinders, and other means for separating anofl'set cylinder from its form cylinder.

12. A printing press including in combination a plurality of formcylinders, two ofi'set cylinders constructed and arranged to form aprintin couple and so that one of said ofl'set cylinders receives adesign from one of the form cylinders and the other oil'set cylinderreceives a design from another of the form cylinders, automatic meansfor separating the ofi'set cylinders, and other means controlled by theoperator for separating an offset cylinder from its form cylinder.

13. A printin press including in combination a plurality of formcylinders, two ofi'set cylinders constructed and arranged to form aprinting couple and so that one of said ofl'set cylinders receives adesign from one of the form cylinders and the other ofi'set cylinderreceives a design from another of the form cylinders, automatic meansfor separating the oflset cylinders, and means controlled by theoperator for separating the offset cylinders without separating eachofi'set cylinder from its form cylinder.

14. A printing press including in combination two form cylinders, ahanger supporting an offset cylinder, said hanger being angularlymovable concentrically with one of the said form cylinders, a hangersupporting a second offset cylinder, said hanger being angularly movableconcentrlcally with the other of said form cylinders, and means forholding the said offset cylinders to each other to form a printingcouple.

15. A printing press including in combination two form cylinders, ahanger supporting an oflset cylinder, said hanger being angularlymovable concentric-ally with one of the said form'cylinders, a hangersupporting a second ofl'set cylinder, said hanger being angularlymovable concentrically with the other of said form cylinders, means forholding the said oflset cylinders to each other to form a printingcouple, and means for regulating the amount of pressure between theofi'set cylinders.

16. A printing press including in combination two form cylinders, ahanger supporting an offset cylinder, said hanger being angularlymovable concentrically with one of the said form cylinders, a hangersupporting a second ofi'set cylinder, said hanger being angularlymovable concentrically with the other of said form cylinders, and meansfor yieldingly holding the said ofi'set cylinders to each other to forma printing couple.

17. A printing press including in combination a form cylinder, a hangersupporting an offset cylinder, said hanger being movable angularlyconcentrically with the form cylinder, means for movingthe form cylinderand offset cylinder radially away from each other and connections foractuating said means.

18. A printing press including in combination a form cylinder, a hangersupporting an offset cylinder, said hanger being movable angularlyconcentrically with the form cylinder, said ofi'set cylinder beingslidably mounted on said hanger, means for moving the offset cylinder onits mounting whereby the form cylinder and ofi'set cylinder pass out ofimpression contact and connections for actuating said means.

19. A printing press including in combination a form cylinder, a hangersupporting an ofl'set cylinder, said hanger being movable angularlyconcentrically with the form cylinder, means for radially separating theform cylinder and offset cylinder, means for angularly moving the saidhanger and actuating connections for each of said means. V

20. A printing press including in combination a form cylinder, inkingrolls therefor, an offset cylinder constructed and arranged to receive adesign from said form cylinder a member constituting with the offsetcylinder a printing couple, means for simultaneously throwing off theimpression and for throwing off the inking rolls from the form cylinder,and means for also throwing off the impression between the offsetcylinder and its form cylinder if desired.

21. A printing press including in combination a form cylinder, inkingrolls therefor, an offset cylinder constructed and arranged to receive adesign from said form cylinder, a member constituting with the offsetcylinder a printing couple, and automatic means for simultaneouslythrowing off the impression and for throwing off the inking rolls fromthe form cylinder, and means for also throwing off the impressionbetween the offset cylinder and its form cylinder as desired.

22. A printing press including in combination a form cylinder, an offsetcylinder in impression contact therewith, a member actin" as animpression member for said offset cylinder, and means for moving theoffset cylinderin one direction to throw off the impression between theoffset cylinder and said impression member and means for moving theoffset cylinder-in another direction for throwing off the impressionbetween it and the form cylinder.

23. A printing press including in combination a plurality ofplanographic form cylinders, two offset cylinders constructed andarranged to form a printing couple and so that one of saidoffsetcylinders receives a design from one of the form cylinders and theother offset cylinder receives a design from another form cylinder, andsingle mechanism acting at both ends of said offset cylinder to movesaid offset cylinderaway' from impression with respect to the otheroffset cylinder withoutseparating it from its form cylinder.

2- A printing press including in combination a plurality of planographicform cylinders, ink rolls for each form cylinder, two

' offset cylinders constructed and arranged to form a printing coupleand so that one of said offset cylinders receives 'a design from one ofthe form cylinders and the other offset cylinder receives a design fromanother form cylinder, and single mechanism acting at both ends of saidoffset cylinder to move said offset cylinder away from impression withrespect to the other offset cylinder without separating it from its form25. A printing press including in combination two form cylinders, twooffset cylinders supported to swing concentrically with said respectiveform cylinders each offset cylinder being printed on by the formcylinder with which it is concentrically mounted, means forcing saidoffset cylinders away from the vertical and toward each other to bringthem into contact with an impression material passing therebetween.

2?). A printing press including in combination two form cylinders, twooffset cylinders supported to swing concentrically with said respectiveform cylinders each offset cylinder being printed on by the formcylinder with which it is concentrically mounted, means forcing saidoffset cylinders away from the vertical and toward each other to bringthem. into contact with an impression material passing therebetween, andmeans for positively moving said cylinders away from each other to throwoff the impression.

27. A printing press including in combination two form cylinders, twooffset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each offset cylinder being printed on by theform cylinder with which it is concentrically mounted, means forcingsaid offset cylinders away from the vertical and toward each other tobring them into.contact with an impression material passingtherebetween.

28. A printing press including in combination two form cylinders, two.offset cylinders supported to swing concentrically with said respectiveform cylinders, each offset cylinder being printed on by the formcylinder with which it is concentrically mounted, means yieldinglyforcing said offset cylinders away from the vertical and toward eachother to bring them into contact with an impression material passingtherebetween.

29. A printing press including in combination two form cylinders, twoofiset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each offset cylinder being printed 011 by theform cylinder with which it is concentrically mounted, means yieldinglyforcing said offset cylinders away from the vertical and toward eachother to bring them into contact with an itnpressirn material passingtherebetween.

30. A printing press including in combination two form cylinders, twooffset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each offset cylinder being printed on by theform cylinder with which it is concentrically mounted, means yieldinglyforcing said offset cylinders away from the "ertical and toward eachother to bring them into contact ith an impression material passingtherewt \Tcn. and means for positively moving 1. ti cylinders away fromeach other to throw off the impression.

31. A printing press including in combination two form cylinders, twooffset cylin zltl'a supported to swing concentrically with saidrespective form cylinders, each oflset lindel' being printed on by theform cylinder with which it is concentrically mounted, means forcingsaid offset cylinders away from the vertical and toward each other tobring them into contact with an impression mutt-r m passingtherebetween, means for supporting a roll of paper and means on theother side of said offset cylinders from said support for positivelydrawing the web through the press.

32. A printing press including in combination two form cylinders, twooffset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each offset cylinder being printed on by theform cylinder with which it is concentrically mounted, means forcingsaid offset cylinders away from the vertical and toward each other tobring them into contact with an impression material passingtherebetween, means for supporting a roll of paper and means on theother side of said off set cylinders from said support for positivelydrawing the web through the press.

38. A printing press including in combination two form cylinders, twooffset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each offset cylinder being printed on by theform cylinder with which it is concentricall mounted, means yieldinglforcing said off set cylinders away from tfie vertical and toward eachother to bring them into contact with an impression material passingtherebetween, means for supporting a roll of paper and means on theother side of said offset cylinders from said support for positivelydrawing the web through the press.

34. A printing press including in combination two form cylinders, twooffset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each offset cylinder being printed on b theform cylinder with which it is concentricall mounted, means yieldinglyforcing said 0 set cylinders away from the vertical and toward eachother to bring them into contact with an impression material passingtherebetween, means automatically controlled by the impression receivingmaterial, for throwing off the impression.

A printing press including in combination two form cylinders, two offsetcylinders supported to swing concentrically with said respective formcylinders, each offset cylinder being printed on by the form cylinderwith which it is concentrically mounted,

means forcin said offset cylinders away from the vertical and towardeach other to bring them into contact with an impression materialpassing therebetween, means automatically controlled by the impressionreceiving material to throw off the impression.

36. A printing press including in combination two form cylinders, twooffset cylinders supported to swing concentrically with said respectiveform cylinders, each offset cylinder being printed on by the formcylinder with which it is concentrically mounted, means forcin saidoffset cylinders away from the vertlcal and toward each other to bringthem into contact with an impression material passing therebetween,means for supporting a roll of paper, means on the other side of saidoffset cylinders from said support for positively drawing the webthrough the press, and means automatically actuated by the web forpositively moving said cylinders away from impression.

37.- A printing press including in combination two form cylinders,offset cylinders supported to swing concentrically with sail respectiveform cylinders, each offset cylin-- der being printed on by the formcylinder with which it is concentrically mounted means forcing saidoffset cylinders away from the vertical and toward each other t) bringthem into contact with an impressic material passing therebetween, andmeans for moving said offsetcylinders radially away from theirrespective form cylinders when said offset cylinders are moved awci fromeach other.

38. A printing pressv including in Combination two form cylinders, twooffset cylin ders supported to swing beneath concentrically with saidrespective form cylinders,

each offset cylinder being printed on by the form cylinder with which itis concen-- trically mounted, means forcing said offset cylinders awayfrom the vertical and to ward each other tobring them into contact withan impression material passin therebetween, and means for movin saidoffset cylinders radially awav from t eir respective form cylinders whensaid offset cylinders are moved away from each other.

39. A printing press including in combination two form cylinders, twooffset cylinders supported to swing concentrically with said respectiveform cylinders, each offset cylinder being printed on by the formcylinder with which it is concentrically mounted, means forcing saidoffset cylinders away from the vertical and toward each other to bringthem into cont-act with an impression material passing therebetween, andmeans for automatically moving said offset cylinders radially away fromtheir respective form cylinders when said offset cylinders are movedaway from each other.

40. A. printing press including in combination two form cylinders, twoofiset cylinders supported to swing beneath concentrically with saidrespective form cylinders, each ofi'set cylinder being printedon by theform cylinder with which it is concentrlcally mounted, means forcingsaid offset cylinders away from the vertical and toward each other tobring them into contact with an impression material passingtherebetween, and means for automatically movin said offset cylindersradially away from t eir respect1ve form cylinders when said oifsetcylinders are moved away from each other.

41. A printing press including in combination two form cylinders, twoofi'set cylinders each mounted to swing concentrically with one of saidform cylinders, means for holding said oflset cylinders in impressioncontact with each other at a point above the lowermost point of theirswing and auto- 2( GEORGE R. CORNWALL.

Witnesses:

JOHN D. MORGAN, CLARA PHILLIPS.

